Drum type abrading device



1951 w. H. VAN ZOMEREN DRUM TYPE ABRADING DEVICE Filed Aug. 8, 1949 INVEN TOR.

ATTORNEY lllll Patented Dec. 25, 1951 .UNITED STATES PATENT OFFICE i i II 2,580,140

DRUM TY PE ABRADING DEVICE William H. Van Zomeren, Kalamazoo, Mich.

Application August 8, 1949, Serial No. 109,155

2 Claims.

1 This invention relates to improvements in drum type abrading device.

The main objects of this invention are: First, to provide an improvedsanding or abrad ing drum which permits very rapid manipulation forremoving or applying the abrading band to the drum.

- Second, to provide a sanding or abrading drum of the segmental sectiontype which may be very quickly and effectively secured to the shaft orspindle or released therefrom. 1

Third, to provide an abrasive strip and securing means thereforto thedrum which greatly facilitates the effective application of the abradingstri to the drum.

Objects relating to details and economies of the invention will appearfrom the description to follow. The invention is defined and pointed outin the claims.

A preferred embodiment of the invention is illustrated in theaccompanying drawing, in which:

Fig. 1 is a side elevational view of a sanding or abrading drumembodying my invention.

Fig. 2 is a fragmentary view mainly in section on a line correspondingto line 2--2 of Fig. 1.

Fig. 3 is a side view of the drum removed from the shaft and partiallyopened illustrating one of the steps in securing the band thereto.

Fig. 4 is a fragmentary view mainly in section on a line correspondingto line 4-4 of Fig. 1 with the clutch elements in released position.

Fig. 5 is a fragmentary view mainly in section on a line correspondingto line 55 of Fig. 2.

Fig. 6 is a perspective view of a roll of the abrasive band of myinvention.

In the embodiment of my invention illustrated, the spindle or shaft I isprovided with an abutment 2 and has a threaded portion 3 adjacent theabutment. The complementary drum members, designated generally by thenumeral 4-4, comprises rim elements 5 having integral web elements 6 andhub elements I and 8. These drum members are pivotally connected at 9 tobe swung to and from each other as is indicated in Fig. 3. The rimelements are provided with bracing webs I 0.

The drum members have pin supports II at their swinging ends, thesesupports having bores l2 adapted to receive the pins l3 which areadjustably and removably secured in the bores by means of the set screwsl4. The supports have bores l5 aligned with the bores l2 to receive theprojecting ends of the pins, as is shown in Fig. 5. The faces I6 ofthese pin supports are flush with 2 the faces I! of the outturned radialrim flanges [8.

The resilient tire I9 is arranged around the rim elements with its endsin abutting relation to the flanges l8. To secure the drum upon theshaft in its closed position, I provide the internally conical clutchmember 2|] disposed on the shaft or spindle I to coact with the abutment2 and to clampingly embrace the conical hub elements I. A second clutchmember 2| is provided having an internal'conical recess 22 adapted toclutchingly embrace the conical hub elements 8. The drum members 4 areprovided with studs or pins 23 adapted to engage the holes 24 in theclutch member 2l' so that when the drum is rotated the member 2| isrotated. The clutch member 2|, being threaded upon the shaft, is movedlongitudinally thereof by rotation of the drum so that the threadedclutch member may be quickly engaged and disengaged by the rotation ofthe drum. When the clutch members are in engagement, the drum iseffectively secured to the shaft for rotation therewith.

The tire serves as a support for the abrasive band 25 which is of awidth corresponding to the width of the tire and of such length that itmay be arranged around the tire as shown in Fig. 3, and its ends engagedwith the pins l2 when the members 4 are in partially open position, asshown in Fig. 3. When the drum members are clo ed and clamped upon theshaft, the band is suitably tensioned and secured by means of the pinsand by being clamped between the flanges l1 and the pin support members.The faces of the support members and the flanges are flush.

To facilitate the forming of the bands of proper length and theirapplication, the abrasive strip designated generally by the numeral 26,has

opposed notches 21 in the edges thereof and severing perforations 28aligned with the notches. These notches 21 and perforations 28 areuniformly spaced longitudinally of the strip so that it may beconveniently severed into sections of the desired length. The band isfurther provided with transverse rows of perforations 29 suitably spacedto receive the pins l2. This greatly facilitates the application of thebands to the drum and saves time and material, as it avoids thenecessity of workmen measuring off the desired amount or cutting andtrying as is the general practice. If a section cut from the roll is tooshort, it is wasted.

I have illustrated and described my invention in a highly practicalembodiment thereof. I have not attempted to illustrate or describevarious W modifications or adaptations as it is believed that thisdisclosure will enable those skilled in the art to embody or adapt myinvention as may be desired.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In an abrading device, the combination with a shaft provided with anabutment and with a threaded portion adjacent the abutment, of identicalcomplementary drum members each comprising rim, hub and web elements,said drum members being pivotally connected at one side thereof andadapted, when brought together, to constitute a circular drum, said hubelements being axially slidable on said shaft and being outwardlytapered at both ends, an internally frusto conical clutch member axiallymovable on said shaft for supported engagement with said abutment and tocoact with one end of both of said hub elements, and a second internallyfrustoconical clutch member meeting with the other end of both of saidhub elements and having threaded engagement with the threaded portion ofsaid shaft, each of said Web elem nts bein provided with an axiallyprojecting stud, said second clutch member having holes therein adaptedto receive said studs so that rotation of the drum in one direction onthe shaft with the studs in engagement with the said second clutchmember acts to move the clutch members together and clamp them upon thehub elements and secure the drum to the'shaft.

2. In an abrading device, the combination with a shaft provided with anabutment, of complementary drum members pivotally connected at one sidethereof and adapted, when brought to gether, to constitute a circulardrum and includ ing hub elements axially slidable on said shaft andtapered at both ends, a clutch member axially movable on said shaft forsupported engagement with said abutment and adapted to clampingly engageone end of hub elements of both drum members, and a second clutch membercoacting with the other ends of the drum member hub elements and havingthreaded engagement with the shaft, each of said drum members beingprovided with an axially projecting stud, said second clutch memberhaving holes therein adapted to receive said studs so that rotation ofthe drum in one direction on the shaft with the studs in engagement withthe said second clutch member acts to move the clutch members togetherand clamp them upon the hub elements and secure the drum to the shaft.

WILLIAM H. VAN ZOMEREN.

REFERENCES CITED UNITED STATES PATENTS Num er v Name Date Re. 8,555Dunham Jan. 28, 1879 136,727 Howe' Mar. 11, 1873 178,994 Buzzell June20, 1876 217,300 Starr July 8, 1879 610,761 Keary Sept. 13, 1898 613,079Ross Oct. 25, 1898 733,577 Catt July 14, 1903 999,436 Dobyne Aug. 1,1911 1,104,684 Levine July 21, 1912 2,107,411 Dunford Feb. 8, 19382,403,434 Gulden July9, 1946 FOREIGN PATENTS Number Country Date 394,137Germany Apr. 12, 1924 400,754

Great Britain Nov. 2, 1933

